This probably isn't 100% what you were hoping for, but:
A major source of roommate drama in the early 1980s was the monthly room phone bill. There weren't any cellphones back then, certainly nothing resembling today's iPhone, so we were all at the mercy of "land lines". On top of that, AT&T was still a monopoly, so the monthly long distance phone bill was EXPENSIVE. $500-$750 per month was completely possible. There was one land line per room, so settling up the bill was completely on the honor system. Major drama could erupt (and did) if there were unrecognized calls to unrecognized numbers, and then the finger-pointing would start about whose room-guest that weekend called which number. Many friendships fell apart over disputed phone calls.